feat: add browser search engines via opensearch description

https://developer.mozilla.org/en-US/docs/Web/OpenSearch

2 files changed, 51 insertions, 1 deletions

diff --git a/internal/server/mux.go b/internal/server/mux.go
index f9eaf03..e15535f 100644
--- a/internal/server/mux.go
+++ b/internal/server/mux.go
@@ -229,6 +229,42 @@ func NewMux(
 		}
 	})
 
+	mux.HandleFunc(
+		"/options/{source}/opensearch.xml",
+		func(w http.ResponseWriter, r *http.Request) {
+			type openSearchData struct {
+				BaseURL string
+				Source  *config.Source
+			}
+
+			sourceKey := r.PathValue("source")
+			source := cfg.Importer.Sources[sourceKey]
+			if source == nil {
+				errorHandler(w, r, "Source not found", http.StatusNotFound)
+
+				return
+			}
+
+			w.Header().Set("Content-Type", "application/opensearchdescription+xml")
+			err := templates["opensearch.xml"].ExecuteTemplate(
+				w,
+				"opensearch.xml.gotmpl",
+				openSearchData{
+					BaseURL: cfg.Web.BaseURL.String(),
+					Source:  source,
+				},
+			)
+			if err != nil {
+				// no errorHandler; HTML does not make sense here
+				http.Error(
+					w,
+					fmt.Sprintf("Template render error: %v", err),
+					http.StatusInternalServerError,
+				)
+			}
+		},
+	)
+
 	mux.Handle("/static/", http.FileServer(http.FS(frontend.Files)))
 
 	if liveReload {
diff --git a/internal/server/templates.go b/internal/server/templates.go
index d8ffcf5..1837665 100644
--- a/internal/server/templates.go
+++ b/internal/server/templates.go
@@ -81,9 +81,23 @@ func loadTemplates() (TemplateCollection, error) {
 	}
 	templates["index"] = index
 
-	glob := path.Join(templateDir, "blocks", "*.gotmpl")
+	glob := path.Join(templateDir, "*.gotmpl")
 	templatePaths, err := fs.Glob(frontend.Files, glob)
 	if err != nil {
+		return nil, errors.WithMessage(err, "could not glob main templates")
+	}
+	for _, fullname := range templatePaths {
+		tpl, err := loadTemplate(layoutFile, fullname)
+		if err != nil {
+			return nil, err
+		}
+		name, _ := strings.CutSuffix(path.Base(fullname), ".gotmpl")
+		templates[name] = tpl
+	}
+
+	glob = path.Join(templateDir, "blocks", "*.gotmpl")
+	templatePaths, err = fs.Glob(frontend.Files, glob)
+	if err != nil {
 		return nil, errors.WithMessage(err, "could not glob block templates")
 	}
 	for _, fullname := range templatePaths {